EP2857361A1 - Phosphorrückgewinnungsmaterial, verfahren zur herstellung eines phosphorrückgewinnungsmaterials und phosphorrückgewinnungsverfahren - Google Patents

Phosphorrückgewinnungsmaterial, verfahren zur herstellung eines phosphorrückgewinnungsmaterials und phosphorrückgewinnungsverfahren Download PDF

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Publication number
EP2857361A1
EP2857361A1 EP13793562.3A EP13793562A EP2857361A1 EP 2857361 A1 EP2857361 A1 EP 2857361A1 EP 13793562 A EP13793562 A EP 13793562A EP 2857361 A1 EP2857361 A1 EP 2857361A1
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EP
European Patent Office
Prior art keywords
phosphorus
phosphorus recovery
recovery material
complex
csh
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13793562.3A
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English (en)
French (fr)
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EP2857361A4 (de
Inventor
Aketo Tsuyoshi
Amamoto Yusaku
Minowa Nobutaka
Nakamura Hiroshi
Nishimura Yasumasa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taiheiyo Cement Corp
Original Assignee
Taiheiyo Cement Corp
Onoda Chemical Industry Co Ltd
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Publication date
Application filed by Taiheiyo Cement Corp, Onoda Chemical Industry Co Ltd filed Critical Taiheiyo Cement Corp
Publication of EP2857361A1 publication Critical patent/EP2857361A1/de
Publication of EP2857361A4 publication Critical patent/EP2857361A4/de
Withdrawn legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/003—Phosphorus
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/20—Silicates
    • C01B33/24—Alkaline-earth metal silicates
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/02—Oxides or hydroxides
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05B—PHOSPHATIC FERTILISERS
    • C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F7/00—Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/12—Surface area
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/14—Pore volume
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/105—Phosphorus compounds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses

Definitions

  • the present invention relates to a phosphorus recovery material which allows efficient recovery of phosphorus from water containing phosphorus and carbonic acid, a method of production of the phosphorus recovery material and a phosphorus recovery method.
  • Phosphorus removing materials (phosphorus recovery materials) containing calcium silicate as a main component have been known.
  • the phosphorus removing materials exhibit an effect of fixing and removing phosphorus in water by generation of calcium phosphate after reaction of calcium silicate in the phosphorus removing materials with phosphorus in water.
  • a phosphorus removing material is disclosed in Patent Literature 1, for example, which is a water treatment agent obtained by heating a substance containing, as a main component, amorphous calcium silicate hydrate having a CaO/SiO 2 molar ratio of 1.5 to 5 at 50 to 700°C.
  • Patent Literature 2 discloses a material for removing phosphorus from sewage water, which is made of amorphous calcium silicate hydrate obtained by hydrothermal reaction, under high pressure and high temperature, of a raw material obtained by adding a foaming agent to water slurry containing a siliceous raw material and a calcareous raw material as main components.
  • Patent Literature 3 discloses a phosphorus removing material which contains amorphous calcium silicate hydrate as a main component and is molded to the shape of spheres or hollow objects having a diameter of a few millimeters.
  • Patent Literature 4 discloses a method for removing phosphorus with the use of wollastonite.
  • the recovered material contains a low amount of phosphorus, and thus cannot be effectively used as phosphate fertilizers.
  • Phosphorus recovery materials which aim to solve the above problems have been proposed, which include a phosphorus recovery material including porous amorphous calcium silicate hydrate fine powder having an average particle diameter(median diameter) of 150 ⁇ m or less and a pore volume of 0.3 cm 3 /g or more (Patent Literature 5) and a phosphorus recovery material including porous amorphous calcium silicate hydrate having an average particle diameter (median diameter) of 10 ⁇ m or more and 150 ⁇ m or less, a BET specific surface area of 80 m 2 /g or more and a pore volume of 0.5 cm 3 /g or more (Patent Literature 6).
  • the phosphorus recovery materials disclosed in Patent Literatures 5 and 6 are advantageous in that the materials have high reactivity with phosphorus, can produce hydroxyapatite to rapidly reduce the phosphorus concentration in waste water and have an increased recovery rate of phosphorus compared to other calcareous materials such as slaked lime. However, the phosphorus recovery materials still do not have sufficient fixing ability of phosphorus in water containing phosphorus and carbonic acid.
  • Patent Literature 7 proposes a method of treatment of phosphorus-containing waste water comprising adding an alkali to waste water containing phosphorus and carbonic acid in the presence of calcium ions to precipitate phosphorus as an insoluble substance and separating sludge containing the insoluble phosphorus from treated water, wherein an acid is added to the waste water containing phosphorus and carbonic acid to adjust pH to 5 or less before aeration treatment and thus decarbonation.
  • Patent Literature 8 proposes a method for removing phosphorus from phosphorus-containing water by providing a flow of raw water containing phosphorus through a reaction tank which is filled with a phosphorus removing material mainly containing calcium silicate hydrate as a seed crystal or in which the material is fluidized, thereby allowing removal of phosphorus from the raw water by crystallization reaction, wherein decarbonation is done by adjusting pH to 4 to 5 through adding sulfuric acid.
  • the present invention provides a phosphorus recovery material which maintains advantages of the above-mentioned phosphorus recovery materials, can recover phosphorus without requiring decarbonation treatment from water containing phosphorus and carbonic acid and has excellent fixing ability of phosphorus and sedimentation property after fixation of phosphorus, a method for producing the phosphorus recovery material and a phosphorus recovery method.
  • the present invention encompasses a phosphorus recovery material having the following components and the like.
  • the phosphorus recovery material of the present invention has an increased recovery capability of phosphorus.
  • the phosphorus recovery method of the present invention does not require decarbonation treatment of water containing phosphorus and carbonic acid.
  • the method can shorten separation time of the phosphorus recovery material after fixation of phosphorus because a mixed liquid of the phosphorus-containing water and the phosphorus recovery material has excellent filterability.
  • CSH amorphous calcium silicate hydrate single substance
  • Ca(OH) 2 the complex between amorphous calcium silicate hydrate and Ca(OH) 2
  • the phosphorus recovery material of the present invention comprising a CSH or CSH complex obtained by reaction between a sodium silicate aqueous solution (water glass) and lime.
  • a sodium silicate aqueous solution water glass
  • lime a sodium silicate aqueous solution
  • the phrase "mix a sodium silicate aqueous solution and lime” encompasses both addition of lime to the sodium silicate aqueous solution for mixing and, inversely, addition of the sodium silicate aqueous solution to lime for mixing.
  • the CSH and the CSH complex have a Ca/Si molar ratio of 0.8 to 1. 5 and preferably 1.0 to 1.3.
  • the value is within the range of 0.8 to 1.5, decarbonation treatment of water containing phosphorus and carbonic acid is not required and the phosphorus recovery material has both high fixing ability of phosphorus and high sedimentation property.
  • the content of Ca(OH) 2 in the complex is about 10 wt% when the Ca/Si molar ratio is 1.5.
  • the water containing phosphorus and carbonic acid is not particularly limited as far as it is water containing phosphorus and carbonic acid.
  • the water preferably has a total carbonic acid concentration in terms of CO 2 of 200 mg/L or more, more preferably 500 mg/L or more and still more preferably 1000 mg/L or more.
  • total carbonic acid collectively refers to carbonic acid (H 2 CO 3 ), bicarbonate (HCO 3 - ) and carbonate (CO 3 2- ).
  • the sodium silicate aqueous solution may be the one commercially available.
  • the lime may be any of slaked lime and quick lime.
  • CSH incorporates Ca(OH) 2 produced by excess lime to give a complex containing Ca(OH) 2 dispersed in CSH.
  • the complex has an improved sedimentation property compared to a mixture obtained by simply mixing Ca(OH) 2 with CSH which is obtained by mixing equivalent amounts of a sodium silicate aqueous solution and lime and thus does not contain Ca(OH) 2 .
  • the phosphorus recovery material of the present invention preferably has a phosphorus fixation index of 70% or more and more preferably 75% or more.
  • the phosphorus recovery material after fixation of phosphorus has sufficiently high phosphorus content and thus can be directly used as a phosphate fertilizer having high fertilizer effect or as a raw material thereof.
  • the phosphorus recovery material of the present invention preferably has a sedimentation index of 95% or more and more preferably 97% or more.
  • the phosphorus recovery material can be easily separated after fixation of phosphorus and the amount of liquid to be filtered in slurry (reaction solution) of the phosphorus recovery material can be reduced.
  • a supernatant contains an extremely low amount of phosphorus-containing suspended substances, the supernatant can be discharged to outside without filtration as far as the supernatant meets the regulation levels for other suspended or floating substances (SS) or chemical components.
  • the sedimentation index is determined according to (i) to (v) below:
  • the phosphorus recovery material of the present invention preferably has a BET specific surface area of 30 to 80 m 2 /g and a pore volume of 0.1 to 0.3 cm 3 /g.
  • the fixing ability of phosphorus is further increased.
  • the production method is the one in which a sodium silicate aqueous solution and lime are mixed without heating to produce the CSH or the CSH complex having a Ca/Si molar ratio of 0.8 to 1.5.
  • the reaction solution containing the produced CSH or CSH complex may be directly used, or a dried material (including powder) may be used that is obtained by drying the CSH or CSH complex separated from the reaction solution.
  • Fig. 1 shows an exemplary production method of the dried phosphorus recovery material.
  • the sodium silicate aqueous solution contains a low amount of impurities, insoluble substances other than CSH and Ca(OH) 2 are rarely produced during the production process. Therefore when the CSH or CSH complex is separated, a process of separating other insoluble substances from the separated CSH or CSH complex is not required and thus the production process can be simplified for that process.
  • the aqueous solution is diluted with water.
  • Lime may be used in the form of slurry in order to avoid generation of flocs upon mixing thereof with the sodium silicate aqueous solution.
  • the raw materials are preferably mixed while stirring in order to obtain uniform reaction. The reaction proceeds at room temperature and thus in principle heating is not required during the mixing (reaction) process.
  • the mixing time of the sodium silicate aqueous solution and lime is preferably 10 to 120 minutes and more preferably 15 to 60 minutes. When the mixing period is less than 10 minutes, the reaction between the sodium silicate solution and lime does not sufficiently proceed and the mixing period of longer than 120 minutes is economically disadvantageous.
  • the amount of lime to be mixed is an amount so as to obtain the CSH or CSH complex having a Ca/Si molar ratio of 0.8 to 1.5 and preferably 1.0 to 1.3.
  • the recovery method is the one in which water containing phosphorus and carbonic acid and a CSH or CSH complex (phosphorus recovery material) having a Ca/Si molar ratio of 0.8 to 1.5 are mixed, liquid and solid are separated and phosphorus is recovered as a solid matter.
  • the water containing phosphorus and carbonic acid is not particularly limited and includes filtrate of excess sludge from sewage treatment plants, separated water from sludge after anaerobic digestion and industrial wastewater containing phosphorus.
  • the CSH and CSH complex can be used for phosphorus recovery in the form of slurry, a dewatered cake or a dried material (including powder). It is preferable, however, that the CSH and CSH complex are used in the form of slurry (including paste) because the CSH and CSH complex in the form of powder may cause white turbidity and because the production process of the phosphorus recovery material can be simplified.
  • Use of the CSH and CSH complex in the form of slurry may omit the necessity of dehydrators or driers, and thus phosphorus recovery can be carried out while producing the phosphorus recovery material with a simple apparatus for production of the phosphorus recovery material installed in situ (for example at sewage treatment plants or industrial plants). In this case, the phosphorus recovery material may not be deteriorated (carbonation).
  • the slurry of the CSH or CSH complex may be prepared by dispersing the CSH or CSH complex in the form of powder into water or may be the reaction solution per se containing the CSH or CSH complex, as described above.
  • the mixing time of water containing phosphorus and carbonic acid and the CSH or CSH complex in the form of powder or slurry is, although it may depend on the amount to be mixed, preferably 5 minutes or more and more preferably 15 minutes or more.
  • the temperature of the liquid to be mixed is not particularly limited and may generally be room temperature.
  • the phosphorus recovery material after fixation of phosphorus is separated by filtration, sedimentation, centrifugation or the like.
  • the separated phosphorus recovery material contains high amount of phosphorus and thus can be used as a phosphate fertilizer or a raw material thereof.
  • Example 1 production of phosphorus recovery material
  • a phosphorus recovery material (sample 7) was prepared with using siliceous shale (extracted in Hokkaido, content of alkali-soluble SiO 2 : 45 wt%) instead of the sodium silicate aqueous solution. Specifically, 0.5 wt% (outer percentage) of NaOH was added to tap water which was heated to 70°C. Siliceous shale was then added thereto and the mixture was stirred at 70°C for 1 hour to dissolve alkali-soluble silica of the siliceous shale.
  • Each of the phosphorus recovery materials was measured for the Ca/Si molar ratio according to JIS R 5202 "Methods for chemical analysis of Portland cement".
  • the phosphorus recovery material was also measured for the BET specific surface area and the pore volume using a sample obtained after vacuum deaeration at 150°C for 1 hour by the nitrogen adsorption method (BJH method) on a specific surface area analyzer (ASAP-2400, available from Micrometrics Instrument Corporation). The results are shown in Table 1.
  • FIG. 2 An XRD chart of the sample 3 which is dry powder having a Ca/Si molar ratio of 1.1 is shown in Fig. 2 . As shown in this chart, the sample 3 has a sole peak of CSH.
  • Sample Ca/Si molar ratio proportion of raw materials Phosphorus recovery material Silicate Slaked lime (g) Tap water (g) Type Silicate (g) Ca/Si molar ratio Specific surface area (m 2 /g) Pore volume (cm 3 /g) 1 0.5 Sodium silicate aqueous solution 55.8 10 244 0.5 85 0.35 2 0.8 34.9 10 265 0.8 78 0.30 3 1.0 27.9 10 272 1.1 62 0.26 4 1.5 18.6 10 281 1.5 58 0.25 5 2.0 14.0 10 286 2.1 52 0.24 6 3.0 9.3 10 291 3.0 48 0.21 7 1.0 Siliceous shale 16.3 10 210 1.1 58 0.25
  • Filtrate of excess sludge from a sewage treatment plant (phosphorus concentration (P 0 ) : 100 mg/L and total carbonic acid concentration in terms of CO 2 : 1400 mg/L) was used as water containing phosphorus and carbonic acid.
  • the Filtrate (100 mL) was mixed with each of the slurries (reaction solutions) of phosphorus recovery materials of samples 1 to 6, the suspension of the phosphorus recovery material of sample 7 and slaked lime powder as a reference so as to obtain a Ca/P molar ratio of 2 between the amount of calcium in the phosphorus recovery material or slaked lime and the amount of phosphorus in the Filtrate. Thereafter the mixed liquid was stirred at a liquid temperature of 20°C for 1 hour to fix phosphorus to the phosphorus recovery material or the like.
  • a portion (5 mL) of the mixed liquid was filtered through the filter paper No. 5C and measured for the phosphorus concentration (P 1 ) in the filtrate and the phosphorus fixation index (R 1 ) was determined.
  • the residual mixed liquid was placed in a 100-mL graduated cylinder and left to stand for 1 hour. Thereafter the upper layer suspension liquid (60 mL) was separated by decantation. Hydrochloric acid was added to the separated suspension to adjust pH to 1 followed by stirring to dissolve the suspended substances. Thereafter, the solution was measured for the phosphorus concentration (P 2 ), and the phosphorus fixation index (R 2 ) and further the sedimentation index (S) were determined.
  • the phosphorus concentration was measured according to the molybdenum blue absorptiometry defined in JIS K 0102 "Testing methods for industrial wastewater".
  • the total carbonic acid concentration was measured on a total organic carbon analyzer (TOC-Vcsn: available from Shimadzu Corporation) operated in the inorganic carbon (IC) mode.
  • the phosphorus recovery material of the present invention has a significantly high fixing ability of phosphorus because the phosphorus fixation index without decarbonation treatment was 62% for both sample 1 having a Ca/Si molar ratio of 0.5 and sample 5 having the ratio of 2.1 and was 43% for sample 6 having the ratio of 3.0, while the index was 75 to 84% for samples 2 to 4 having the ratio in the range of 0.8 to 1.5.
  • Sample 7 which was prepared from siliceous shale had a low phosphorus fixation index of 60%, although sample 7 had a Ca/Si molar ratio of 1.1.
  • samples 2 to 4 had a phosphorus fixation index of 90 to 92%, and thus the phosphorus recovery material of the present invention has almost the same level of fixing ability of phosphorus without decarbonation treatment as that obtained with decarbonation treatment.
  • the phosphorus recovery material of the present invention has an increased sedimentation property because the sedimentation index was 91% for sample 5 having a Ca/Si molar ratio of 2.1 and 81% for sample 6 having the ratio of 3.0%, while the index was 95 to 99% for samples 2 to 4 having the ratio in the range of 0.8 to 1.5.
  • the phosphorus recovery material of the present invention after fixation of phosphorus has a high sedimentation property in phosphorus-containing water even in the absence of decarbonation treatment.
  • Sample 1 having a Ca/Si molar ratio of 0.5 has a high sedimentation property of 100% while it has low phosphorus fixation index of 62%.
  • Slaked lime has both a low phosphorus fixation index of 18% and sedimentation index of 56%.
  • the phosphorus recovery material of the present invention has an excellent phosphorus recovery capability.
  • the phosphorus recovery material of the present invention can also be applied to any kind of phosphorus-containing water and can be suitably used at sewage treatment plants of any kind of system without requiring pretreatment.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Engineering & Computer Science (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Removal Of Specific Substances (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Fertilizers (AREA)
EP13793562.3A 2012-05-25 2013-05-24 Phosphorrückgewinnungsmaterial, verfahren zur herstellung eines phosphorrückgewinnungsmaterials und phosphorrückgewinnungsverfahren Withdrawn EP2857361A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012120260A JP5972050B2 (ja) 2012-05-25 2012-05-25 リン回収材の製造方法
PCT/JP2013/064444 WO2013176244A1 (ja) 2012-05-25 2013-05-24 リン回収材、リン回収材の製造方法およびリン回収方法

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EP2857361A1 true EP2857361A1 (de) 2015-04-08
EP2857361A4 EP2857361A4 (de) 2016-05-25

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JP (1) JP5972050B2 (de)
CN (1) CN104364204A (de)
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110280208A (zh) * 2019-07-11 2019-09-27 南京理工大学 由化工回收磷酸盐制备羟基磷灰石的方法
US10688464B2 (en) 2017-06-05 2020-06-23 General Atomics Corrosion inhibition in hydrothermal processing

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6381035B2 (ja) * 2015-01-07 2018-08-29 太平洋セメント株式会社 リン回収材の中間体の製造方法、およびリン回収材の製造方法
CN104975535A (zh) * 2015-06-25 2015-10-14 广西白莹纸业有限公司 聚集体蓬松多孔性硅酸钙的合成方法
JP6670534B2 (ja) * 2016-02-29 2020-03-25 小野田化学工業株式会社 リン回収材およびその製造方法
CN106745781B (zh) * 2017-01-17 2020-09-08 上海交通大学 具有底泥磷固定与吸收功能的下沉式生态修复装置
JP6894855B2 (ja) * 2018-01-24 2021-06-30 太平洋セメント株式会社 非晶質ケイ酸カルシウム水和物の製造法
JP7165538B2 (ja) * 2018-03-08 2022-11-04 国立大学法人宇都宮大学 リン回収材およびその製造方法
CN113104856B (zh) * 2021-05-08 2022-11-04 中南大学 一种水体除磷材料的制备方法、产品及应用
CN115180645B (zh) * 2022-07-19 2023-04-25 中国科学院广州地球化学研究所 一种硅基无定形碳酸钙及其制备方法和应用

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58139784A (ja) * 1982-02-16 1983-08-19 Kurita Water Ind Ltd 脱リン剤および脱リン方法
JPS61263636A (ja) 1985-05-17 1986-11-21 Ube Ind Ltd 珪酸カルシウム系水処理剤
JPS61174985A (ja) * 1985-01-31 1986-08-06 Ube Ind Ltd 珪酸カルシウム系水処理剤
US4707270A (en) * 1985-01-31 1987-11-17 Ube Industries, Ltd. Process for treating waste water containing phosphorus compounds and/or organic cod substances
JPS62183898A (ja) 1986-02-10 1987-08-12 Onoda Cement Co Ltd 汚水の脱リン材
JP2564150B2 (ja) * 1987-10-15 1996-12-18 電気化学工業株式会社 合成ケイ酸カルシウム水和物
JP3569086B2 (ja) 1996-05-21 2004-09-22 三菱マテリアル株式会社 リン含有水の脱リン方法
IL121641A0 (en) * 1996-09-03 1998-02-08 Minerals Tech Inc Method of producing synthetic silicates and use thereof in glass production
JP2881410B2 (ja) * 1996-12-06 1999-04-12 洋一 西村 産業廃棄物の処理方法
JP3308196B2 (ja) 1996-12-28 2002-07-29 三菱マテリアル株式会社 脱リン材の製造方法
JP2000135493A (ja) 1998-11-02 2000-05-16 Sekisui Chem Co Ltd 排水中のリン酸イオンの除去方法
JP2001259414A (ja) * 2000-03-23 2001-09-25 Mitsubishi Materials Corp りん回収材
JP2003285089A (ja) * 2002-03-27 2003-10-07 Kurimoto Ltd 排水のリン成分除去方法
JP2004174386A (ja) 2002-11-27 2004-06-24 Kurita Water Ind Ltd リン酸含有排水の処理方法
JP2004249263A (ja) * 2003-02-21 2004-09-09 Mitsubishi Materials Corp リン回収材およびその製造方法
JP5201455B2 (ja) * 2008-05-30 2013-06-05 小野田化学工業株式会社 リン回収資材とその製造方法およびリン回収方法
JP5201454B2 (ja) * 2008-05-30 2013-06-05 小野田化学工業株式会社 リン回収資材およびリン回収方法
JP5931369B2 (ja) * 2010-08-03 2016-06-08 小野田化学工業株式会社 リン回収材およびその製造方法
JP5703509B2 (ja) * 2010-10-15 2015-04-22 独立行政法人農業・食品産業技術総合研究機構 排水の脱リン脱色消毒剤と処理方法および処理装置
WO2012176579A1 (ja) * 2011-06-24 2012-12-27 太平洋セメント株式会社 リン回収・肥料化方法
JP2013052346A (ja) * 2011-09-05 2013-03-21 Taiheiyo Cement Corp リン回収材
JP5946105B2 (ja) * 2012-05-09 2016-07-05 太平洋セメント株式会社 リン回収材、およびリン回収方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10688464B2 (en) 2017-06-05 2020-06-23 General Atomics Corrosion inhibition in hydrothermal processing
CN110280208A (zh) * 2019-07-11 2019-09-27 南京理工大学 由化工回收磷酸盐制备羟基磷灰石的方法

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WO2013176244A1 (ja) 2013-11-28

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